Search for pdfs online
Some of us are quite obsessed with google that even to go to a ebay website we type ebay in google and then go to ebay. Therefore it is necessary to go for customized search related to what you actually want. If you want to search for subtitles you have subtitle search engines. If you want to download music, you need a music search engine. If you want to search for some important pdfs there is pdf search engine.
